CN219625814U - Head-up display module assembly and vehicle - Google Patents

Abstract

The utility model discloses a head-up display module and a vehicle, comprising: the device comprises a first waveguide module, a second waveguide module and a reflecting layer; the first waveguide modules and the second waveguide modules are arranged in parallel and staggered; the first light coupled out by the first waveguide module forms a first light area; the second light is coupled out through the second waveguide module to form a second light area, wherein the directions of the first light and the second light are the same, and the first light area and the second light area are spliced or partially overlapped in a seamless manner; the reflecting layer is positioned at a preset position opposite to the first light ray and the second light ray, and the reflecting layer is used for reflecting the light rays emitted to the reflecting layer to the first light ray region and the second light ray region. According to the head-up display module and the vehicle, provided by the utility model, the two waveguide modules with smaller sizes can be combined, so that the diffraction waveguide scheme can be continued, the head-up display module has the characteristics of small size and light weight, the display performance with a large viewing angle can be supported, and the manufacturing difficulty can be reduced.

Description

Head-up display module assembly and vehicle

Technical Field

The utility model belongs to the technical field of head-up display, and particularly relates to a head-up display module and a vehicle.

Background

Head-Up Display (HUD) is a technology of projecting contents such as travel information and navigation information onto a Display screen or a windshield. Therefore, the HUD can integrate contents such as driving information, navigation information and the like with road conditions in a real traffic scene, and an interactive feedback information loop is built between the real world, the information world and a user, so that the perception of the driving information by the user is improved.

In one implementation, the HUD may be implemented based on an augmented reality display technique that enables a user to simultaneously view information in the real world, such as images or data superimposed in the real world. The augmented reality display technology mainly comprises a coaxial side view prism scheme, an array semi-permeable membrane waveguide scheme, a free-form surface scheme, a diffraction waveguide scheme and the like, and the display performances of different schemes are different.

Among them, the diffraction waveguide scheme is widely used due to its advantages of small size, light weight, etc. However, in order for the diffractive waveguide solution to support a sufficiently large field angle, a number of multiplications plus diffractive waveguide surface area is required, however, the manufacturing difficulty of large-sized diffractive waveguides is enormous, subject to the limitations of the diffractive waveguide manufacturing process.

Therefore, how to provide a diffraction waveguide solution that can support a large field angle and is difficult to manufacture is a problem that needs to be solved at present.

Disclosure of Invention

The utility model provides a head-up display module and a vehicle, which can support a large field angle and have small manufacturing difficulty.

In a first aspect, the present utility model provides a head-up display module, including: the device comprises a first waveguide module, a second waveguide module and a reflecting layer; the first waveguide modules and the second waveguide modules are arranged in parallel and staggered; the first light coupled out by the first waveguide module forms a first light area; forming a second light region by the second light coupled out of the second waveguide module, wherein the direction of the first light is the same as that of the second light, and the first light region and the second light region are spliced or partially overlapped in a seamless manner; the reflecting layer is positioned at a preset position opposite to the first light ray and the second light ray, and the reflecting layer is used for reflecting the light rays emitted to the reflecting layer to the first light ray region and the second light ray region.

In one implementation, the first waveguide module includes a first optomechanical module and a first diffractive waveguide module; the second waveguide module comprises a second optical machine module and a second diffraction waveguide module; the first optical-mechanical module is arranged vertically to the first diffraction waveguide module and is used for emitting first image light; the second optical-mechanical module is arranged vertically to the second diffraction waveguide module and is used for emitting second image light; the image corresponding to the first image light is the same as the image corresponding to the second image light.

In one implementation, the first diffractive waveguide module includes a first slab waveguide, a first in-coupling region, and a first out-coupling region; the first opto-mechanical module, the first in-coupling region and the first out-coupling region are located on the same side of the first slab waveguide; the second diffraction waveguide module comprises a second slab waveguide, a second coupling-in region and a second coupling-out region; the second opto-mechanical module, the second in-coupling region and the second out-coupling region are located on the same side of the second slab waveguide.

In one implementation manner, the first optical module includes a first illumination unit and a first projection unit, where the first projection unit is located between the first coupling-out area and the first illumination unit, and a projection port of the first projection unit is disposed opposite to the first coupling-out area.

In one implementation manner, the second optical module includes a second illumination unit and a second projection unit, where the second projection unit is located between the second coupling-out area and the second illumination unit, and a projection port of the second projection unit is disposed opposite to the second coupling-out area.

In one implementation, the projection area of the reflective layer covers the first outcoupling area and the second outcoupling area.

In one implementation, the reflective layer is a metallic reflective layer.

In one implementation, the first slab waveguide and the second slab waveguide have a light transmittance of 70%.

In one implementation, the first coupling-in region, the first coupling-out region, the second coupling-in region, and the second coupling-out region employ one or more of a relief grating, a volume hologram grating, and a liquid crystal grating.

In a second aspect, the present utility model further provides a vehicle, including the head-up display module set according to any one of the first aspect.

According to the head-up display module and the vehicle, provided by the utility model, the two waveguide modules with smaller sizes can be combined, so that the diffraction waveguide scheme can be continued, the head-up display module has the characteristics of small size and light weight, the display performance with a large viewing angle can be supported, and the manufacturing difficulty can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a head-up display module according to an embodiment of the present utility model;

fig. 2 is a light path diagram of a head-up display module according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a head-up display module applied to a vehicle according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of an eye-box range corresponding to a conventional head-up display module;

fig. 5 is a schematic diagram of an eye box range corresponding to a head-up display module according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of the FOV supported by a single waveguide module;

FIG. 7 is a schematic diagram of the FOV supported by the head-up display module according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of the first coupling-out region 103 separated from the second coupling-out region 203.

Description of the reference numerals

10-a first waveguide module, 20-a second waveguide module, 30-a reflective layer, 40-a windshield, 50-a human eye, 60-a virtual image;

101-a first slab waveguide, 102-a first in-coupling region, 103-a first out-coupling region, 104-a first lighting unit, 105-a first projection unit;

201-second slab waveguide, 202-second in-coupling region, 203-second out-coupling region, 204-second illumination unit, 205-second projection unit.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

It should be noted that the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprise," "include," or any other variation thereof, are intended to cover a non-exclusive inclusion.

Head-Up Display (HUD) is a technology of projecting contents such as travel information and navigation information onto a Display screen or a windshield. Therefore, the HUD can integrate contents such as driving information, navigation information and the like with road conditions in a real traffic scene, and an interactive feedback information loop is built between the real world, the information world and a user, so that the perception of the driving information by the user is improved.

In one implementation, the HUD may be implemented based on an augmented reality display technique that enables a user to view a real environment in the real world while information such as images or data superimposed in the real environment is also viewable. That is, the augmented reality display technology provides a function of real-time in-situ interaction with a real environment without any obstacle, and brings a brand new visual experience to users.

At present, the augmented reality display technology mainly comprises a coaxial side view prism scheme, an array type semi-permeable membrane waveguide scheme, a free-form surface scheme, a diffraction waveguide scheme and the like, and the display performances of different schemes are different.

For example, the diffractive waveguide scheme projects contents such as travel information and navigation information onto a display screen or a windshield mainly based on a diffractive waveguide and a grating having a diffraction function. The diffraction waveguide scheme has advantages of small volume, light weight, etc., but in order to support a sufficiently large angle of view, several multiplications are required to increase the surface area of the diffraction waveguide, however, the manufacturing difficulty of the large-sized diffraction waveguide and its huge limitation by the diffraction waveguide manufacturing process.

The embodiment of the utility model provides a head-up display module, which can continue the diffraction waveguide scheme, has the characteristics of small volume and light weight, can support the display performance of a large field angle and can reduce the manufacturing difficulty.

The following describes a head-up display module according to an embodiment of the present utility model in detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a head-up display module according to an embodiment of the present utility model, and fig. 2 is a light path diagram of a head-up display module according to an embodiment of the present utility model.

As shown in fig. 1 and fig. 2, the head-up display module provided in the embodiment of the utility model includes a first waveguide module 10, a second waveguide module 20, and a reflective layer 30. The first waveguide modules 10 and the second waveguide modules 20 are arranged in parallel and staggered, and the first light coupled out by the first waveguide modules 10 forms a first light area A; the second light coupled out by the second waveguide module 20 forms a second light region B, wherein the direction of the first light is the same as that of the second light, and the first light region a and the second light region B are spliced or partially overlapped in a seamless manner; the reflective layer 30 is located at a predetermined position opposite to the first light and the second light, and the reflective layer 30 is configured to reflect the light emitted to the reflective layer 30 to the first light area a and the second light area B.

Therefore, the head-up display module provided by the embodiment of the utility model can realize a large field angle by combining two waveguide modules with smaller sizes, so that the waveguide modules with large sizes are not needed, and the manufacturing difficulty of the head-up display module is reduced.

The first waveguide module 10 and the second waveguide module 20 are described in detail below.

In one implementation, the first waveguide module 10 may include a first opto-mechanical module and a first diffractive waveguide module, and the second waveguide module 20 may include a second opto-mechanical module and a second diffractive waveguide module. The first optical-mechanical module is arranged vertically to the first diffraction waveguide module and is used for emitting first image light; the second optical-mechanical module is arranged vertically to the second diffraction waveguide module and is used for emitting second image light; the image corresponding to the first image light is the same as the image corresponding to the second image light.

In this way, the first optical machine module is perpendicular to the first diffraction waveguide module, and the second optical machine module is perpendicular to the second diffraction waveguide module, so that the first light coupled out by the first diffraction waveguide module is parallel to the second light coupled out by the second diffraction waveguide module. And because the first image light is the same as the second image light, the complete virtual image can be ensured to be obtained.

Illustratively, as shown in fig. 3, the first light coupled out by the first diffractive waveguide module and the second light coupled out by the second diffractive waveguide module are projected onto the windshield 40, and reflected by the windshield 40 and enter the human eye 50. In this way, the human eye 50 can view the virtual image 60 formed in front of the windshield 40.

In one implementation, as shown in fig. 1, the first diffractive waveguide module may include a first slab waveguide 101, a first in-coupling region 102, and a first out-coupling region 103. The second diffractive waveguide module comprises a second slab waveguide 201, a second in-coupling region 202 and a second out-coupling region 203. The first opto-mechanical module may comprise a first illumination unit 104 and a first projection unit 105; the second opto-mechanical module may comprise a second illumination unit 204 and a second projection unit 205. Wherein the first illumination unit 104 may be used to provide first image light and the second illumination unit 204 may be used to provide second image light.

Thus, as shown in fig. 2, the first image light emitted from the first optical engine module is coupled into the first slab waveguide 101 through the first coupling-in region 102 of the first diffractive waveguide module, and the first slab waveguide 101 totally reflects and guides the first image light to the first coupling-out region 103. The first image light is conducted through the first slab waveguide 101, so that three light rays can be obtained. The first part of light is light M1 which is diffracted by the first coupling-out area 103 and is transmitted in the first direction; the second part of light is light M2 which is diffracted by the first coupling-out area 103 and is transmitted in a second direction, wherein the first direction and the second direction are opposite directions; the third portion of the light is the light M3 that continues to be conducted along the conducting direction of the first slab waveguide 101.

Similarly, the second image light emitted from the second optical-mechanical module is coupled into the second slab waveguide 201 through the first coupling-in region 202 of the second diffractive waveguide module, and the second slab waveguide 201 totally reflects and guides the second image light to the second coupling-out region 203. Wherein the second image light is conducted through the second slab waveguide 201, three portions of light can be obtained. The first part of light is light N1 which is diffracted by the second coupling-out area 203 and is transmitted in the first direction; the second portion of light is light N2 that is diffracted by the second coupling-out area 203 and is transmitted in a second direction, where the first direction and the second direction are opposite directions; the third portion of light is light N3 that continues to propagate along the propagation direction of the second slab waveguide 201.

The first direction light rays (M1 and N1) or the second direction light rays (M2 and N2) formed above may be the direction of light rays that are finally directed toward the windshield. That is, if the light rays (M1 and N1) in the first direction are the light rays to be finally directed toward the windshield, the light rays (M2 and N2) in the second direction are wasted. Similarly, if the light rays (M2 and N2) in the second direction are the light rays that are finally directed toward the windshield, the light rays (M1 and N1) in the first direction are wasted.

Thus, to increase the overall light utilization, the light that is in the opposite direction to the light that is ultimately directed to the windshield is reflected by the reflective layer 30 in the present embodiment as light in the same direction as the light that is ultimately directed to the windshield.

Illustratively, taking the first direction as the direction of the light rays ultimately to be directed towards the windshield as an example, the light rays (M2 and N2) in the second direction formed by the first and second outcoupling regions 103 and 203 may be reflected as light rays M4 and N4 in the first direction, respectively, by the reflective layer 30. Thus, the light rays (M1 and N1) in the first direction formed by diffraction in the coupling-out region and the light rays (M4 and N4) in the first direction formed by reflection in the reflection layer 30 can be emitted to the windshield 40, so that not only the light comprehensive utilization rate can be increased, but also the brightness of the virtual image 60 can be improved.

In a specific example, the reflective layer 30, the first diffractive waveguide module 10, and the second diffractive waveguide module 20 are sequentially disposed along the first direction. The projection area of the reflective layer 30 covers the first coupling-out area 103 and the second coupling-out area 203, so that the reflective layer 30 can take into account the light rays in the second direction formed by the first coupling-out area 103 and the second coupling-out area 203, and further can reflect the light rays (M2 and N2) in the second direction into the light rays M4 and N4 in the first direction, respectively.

The embodiment of the utility model does not limit the design positions of the coupling-in area and the coupling-out area.

In one possible implementation, as shown in fig. 1, the first in-coupling region 102 and the first out-coupling region 103 are located on the same side of the first slab waveguide 101, and the second in-coupling region 202 and the second out-coupling region 203 are located on the same side of the second slab waveguide 201. Correspondingly, the first optical module and the first coupling-in area 102 are located at the same side, and a projection port of the first projection unit 105 in the first optical module is opposite to the first coupling-out area 103, so that the first image light emitted by the first optical module is incident into the first coupling-in area 102. The second optical-mechanical module and the first coupling-in area 202 are located on the same side, and a projection opening of the second projection unit 205 in the second optical-mechanical module is opposite to the second coupling-out area 203, so that the second image light emitted by the second optical-mechanical module is incident into the second coupling-in area 202.

Thus, as shown in fig. 1, the first coupling-in area 102, the first coupling-out area 103, the first optomechanical module, the second coupling-in area 202, the second coupling-out area 203 and the second optomechanical module are all located on the same side. The first optical machine module and the second optical machine module are distributed on two sides of the outermost end of the whole head-up display module. The first and second outcoupling regions 103, 203 are spatially staggered in parallel, e.g. the projections of the first and second outcoupling regions 103, 203 spatially have no gaps, are just stitched together, or the projections of the first and second outcoupling regions 103, 203 spatially overlap. In this way, a seamless splice or partial overlap of the first light ray region a and the second light ray region B can be ensured.

It should be noted that, in the embodiment of the present utility model, an optical structure having a light diffraction function and capable of performing bending conduction for a specific light is adopted for the first coupling-in region 102, the first coupling-out region 103, the second coupling-in region 202, and the second coupling-out region 203, but the specific optical structure adopted for the first coupling-in region 102, the first coupling-out region 103, the second coupling-out region 202, and the second coupling-out region 203 is not limited. For example, the first coupling-in region 102, the first coupling-out region 103, the second coupling-in region 202, the second coupling-out region 203 may employ one or more of a relief grating, a volume hologram grating, a liquid crystal grating, etc.

In the embodiment of the present utility model, the first slab waveguide 101 and the second slab waveguide 201 are used for conducting image light, and the materials used for the first slab waveguide 101 and the second slab waveguide 201 are not limited. For example, the first slab waveguide 101 and the second slab waveguide 201 may be made of a material having a light transmittance of 70%. For example, the first slab waveguide 101 and the second slab waveguide 201 may be made of a material such as resin or glass.

It should be further noted that the structure and the material of the reflective layer 30 are not limited in the embodiment of the present utility model. For example, the reflective layer may be a metal layer having reflective properties, or may be another structural layer having reflective properties.

The technical effects of the head-up display module provided by the embodiment of the utility model, which can realize a large eye box and a large field angle, are described in detail below.

First, the technical terms of the range of the eyebox and the angle of view in the embodiment of the present utility model will be briefly described.

1. Eye box range: the eyes, HUD and road three-point line have an extremely unstable factor, namely the positions of the eyes. The height, sitting position, head position, etc. of the driver affect the position of eyes and the direction of vision, resulting in inconsistent driving views of everyone. The range of the eyebox refers to the area that is still capable of receiving all incident angle light at a distance from the waveguide. That is, the range of the eyebox refers to the area where the eyes can move, and different positions of the eyebox can affect the alignment of the images, for example, if the eyes are located in a certain area, the whole image can be seen, whereas the whole image cannot be seen if the area is out.

2. Angle of view: the field angle in the embodiment of the utility model refers to an included angle between the display edge of the head-up display module and the connecting line of the human eyes. For example, the angle of view is-10 ° to 10 °. The field angle may be represented by FOV.

The technical effects of the large eye box can be achieved by the head-up display module provided by the embodiment of the utility model are explained in detail below.

Fig. 4 shows an eye box range corresponding to a conventional head-up display module, and fig. 5 shows an eye box range corresponding to a head-up display module provided by an embodiment of the present utility model. Fig. 4 and 5 show the range of the eye boxes supported by the head-up display module when the FOV is the same. For example, the FOV of the head-up display modules shown in FIGS. 4 and 5 are all from-10 to 10.

As shown in fig. 4, a conventional head-up display module may include only one waveguide module. I.e. one waveguide module shown in solid lines in fig. 4, for example the first waveguide module 10.

For a conventional, single waveguide module, the eyebox range is eyebox range 1 as shown in fig. 4, that is, light of-10 to 10 degrees is simultaneously visible only within eyebox range 1.

As shown in fig. 5, the head-up display module provided in the embodiment of the present utility model uses two waveguide modules in combination, so that the corresponding eyebox range includes three parts, that is, an eyebox range 1, an eyebox range 2, and an eyebox range 3. That is, the range of the eye box corresponding to the head-up display module provided by the embodiment of the utility model is the sum of the range of the eye box 1, the range of the eye box 2 and the range of the eye box 3. That is, light of-10 degrees to 10 degrees can be seen at the same time in the range of the eyebox range 1+the eyebox range 2+the eyebox range 3.

As can be seen from fig. 4 and fig. 5, the use of the head-up display module provided by the embodiment of the utility model can increase the range of the eye box under the condition that the FOV is fixed. Specifically, compared with the eye box range 1 implemented in fig. 4, the eye box range enlarged by the head-up display module provided by the embodiment of the utility model is an eye box range 2+an eye box range 3. Thus, by using the head-up display module provided by the embodiment of the utility model, a wider viewing area can be obtained.

The technical effects of the head-up display module provided by the embodiment of the utility model with a large angle of view are described in detail below.

Figure 6 shows a schematic diagram of the FOV supported by a single waveguide module. Fig. 7 shows a schematic diagram of FOV supported by a head-up display module according to an embodiment of the present utility model. Fig. 6 and 7 show FOVs supported by the head-up display module in the case of the same range of the eyebox. For example, the eye-box range of the head-up display module shown in fig. 6 and 7 is the eye-box range 1 in fig. 4.

As shown in fig. 6, for a conventional, single waveguide module, only a small field angle FOV1, for example, the field angle FOV1 of-10 ° to 10 °, can be supported in practice due to the area limitation of the first coupling-out region 103 corresponding to the first waveguide module 10, in combination with the fixed viewing distance.

As shown in fig. 7, for the head-up display module provided in the embodiment of the present utility model, under the condition that the range 1 of the eye box remains unchanged, the range of the corresponding field angle FOV2 is obviously increased, for example, the field angle FOV2 that can be supported by the head-up display module provided in the embodiment of the present utility model is-20 ° to 20 °. Thus, the visual field range of the user can be further enlarged, and the user experience is improved.

In summary, the head-up display module provided by the embodiment of the utility model can realize the technical effects of a large eye box and a large field angle by combining two waveguide modules.

It should be noted that, in the embodiment of the present utility model, the projection of the first coupling-out area 103 and the second coupling-out area 203 on the space is required to have no gap, just can be spliced together, or the reason why the projection of the first coupling-out area 103 and the second coupling-out area 203 on the space partially overlap is that: avoiding that part of the light rays at the angle cannot be transmitted to the specified range of the eye box.

Fig. 8 shows a case where the first outcoupling region 103 is separated from the second outcoupling region 203. The prescribed eyebox range is assumed to be eyebox range 1. As shown in fig. 8, in the case where there is a space between the first coupling-out region 103 of the first waveguide module 10 and the second coupling-out region 203 of the second waveguide module 20 in the spatial projection, there is a space K between the first light region a formed correspondingly by the first coupling-out region 103 and the second light region B formed correspondingly by the second coupling-out region 203. At this time, there is a problem that some light beams cannot be transmitted to the predetermined eye box (eye box range 1), and thus, the embodiment of the present utility model requires that the projection of the first coupling-out region 103 and the second coupling-out region 203 in space should be seamless.

The embodiment of the utility model also provides a vehicle, which can comprise the head-up display module in the embodiment. Thus, as shown in fig. 3, the light emitted from the head-up display module is projected onto the windshield 40, reflected by the windshield 40, and enters the human eye 50, and the human eye 50 can view the virtual image 60 formed in front of the windshield 40.

The description of the head-up display module in the above embodiment may be referred to herein, and will not be repeated here.

It should be noted that, in the embodiment of the present utility model, the installation position of the head-up display module in the vehicle is not limited, and may be set according to the space condition in the vehicle, for example.

In this description, the same and similar parts of the embodiments are referred to each other, and especially, the corresponding embodiment parts of the vehicle may be raised to the head display module part.

The utility model has been described in detail in connection with the specific embodiments and exemplary examples thereof, but such description is not to be construed as limiting the utility model. It will be understood by those skilled in the art that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present utility model and its embodiments without departing from the spirit and scope of the present utility model, and these fall within the scope of the present utility model. The scope of the utility model is defined by the appended claims.

Claims (10)

1. The utility model provides a new line display module assembly which characterized in that includes: the device comprises a first waveguide module, a second waveguide module and a reflecting layer;

the first waveguide modules and the second waveguide modules are arranged in parallel and staggered;

the first light coupled out by the first waveguide module forms a first light area;

forming a second light region by the second light coupled out of the second waveguide module, wherein the direction of the first light is the same as that of the second light, and the first light region and the second light region are spliced or partially overlapped in a seamless manner;

the reflecting layer is positioned at a preset position opposite to the first light ray and the second light ray, and the reflecting layer is used for reflecting the light rays emitted to the reflecting layer to the first light ray region and the second light ray region.

2. The heads-up display module of claim 1 wherein the first waveguide module comprises a first optomechanical module and a first diffractive waveguide module; the second waveguide module comprises a second optical machine module and a second diffraction waveguide module;

the first optical-mechanical module is arranged vertically to the first diffraction waveguide module and is used for emitting first image light;

the second optical-mechanical module is arranged vertically to the second diffraction waveguide module and is used for emitting second image light;

the image corresponding to the first image light is the same as the image corresponding to the second image light.

3. The head-up display module of claim 2, wherein the first diffractive waveguide module comprises a first slab waveguide, a first in-coupling region, and a first out-coupling region; the first opto-mechanical module, the first in-coupling region and the first out-coupling region are located on the same side of the first slab waveguide;

the second diffraction waveguide module comprises a second slab waveguide, a second coupling-in region and a second coupling-out region; the second opto-mechanical module, the second in-coupling region and the second out-coupling region are located on the same side of the second slab waveguide.

4. The head-up display module of claim 3, wherein the first optomechanical module comprises a first illumination unit and a first projection unit, the first projection unit is located between the first coupling-out region and the first illumination unit, and a projection port of the first projection unit is disposed opposite to the first coupling-out region.

5. The head-up display module of claim 3, wherein the second optomechanical module comprises a second illumination unit and a second projection unit, the second projection unit is located between the second coupling-out region and the second illumination unit, and a projection port of the second projection unit is disposed opposite to the second coupling-out region.

6. The head-up display module of claim 3, wherein the projection area of the reflective layer covers the first and second outcoupling areas.

7. The head-up display module of claim 1, wherein the reflective layer is a metallic reflective layer.

8. The head-up display module of claim 3, wherein the first slab waveguide and the second slab waveguide have a light transmittance of 70%.

9. The head-up display module of claim 3, wherein the first in-coupling region, the first out-coupling region, the second in-coupling region, and the second out-coupling region employ one or more of a relief grating, a volume hologram grating, and a liquid crystal grating.

10. A vehicle comprising the heads-up display module of any one of claims 1-9.